public static TabletLocationState createTabletLocationState(Key k, Value v)
throws IOException, BadLocationStateException {
final SortedMap<Key, Value> decodedRow = WholeRowIterator.decodeRow(k, v);
KeyExtent extent = null;
TServerInstance future = null;
TServerInstance current = null;
TServerInstance last = null;
long lastTimestamp = 0;
List<Collection<String>> walogs = new ArrayList<Collection<String>>();
boolean chopped = false;
for (Entry<Key, Value> entry : decodedRow.entrySet()) {
Key key = entry.getKey();
Text row = key.getRow();
Text cf = key.getColumnFamily();
Text cq = key.getColumnQualifier();
if (cf.compareTo(TabletsSection.FutureLocationColumnFamily.NAME) == 0) {
TServerInstance location = new TServerInstance(entry.getValue(), cq);
if (future != null) {
throw new BadLocationStateException(
"found two assignments for the same extent "
+ key.getRow()
+ ": "
+ future
+ " and "
+ location);
}
future = location;
} else if (cf.compareTo(TabletsSection.CurrentLocationColumnFamily.NAME) == 0) {
TServerInstance location = new TServerInstance(entry.getValue(), cq);
if (current != null) {
throw new BadLocationStateException(
"found two locations for the same extent "
+ key.getRow()
+ ": "
+ current
+ " and "
+ location);
}
current = location;
} else if (cf.compareTo(LogColumnFamily.NAME) == 0) {
String[] split = entry.getValue().toString().split("\\|")[0].split(";");
walogs.add(Arrays.asList(split));
} else if (cf.compareTo(TabletsSection.LastLocationColumnFamily.NAME) == 0) {
if (lastTimestamp < entry.getKey().getTimestamp())
last = new TServerInstance(entry.getValue(), cq);
} else if (cf.compareTo(ChoppedColumnFamily.NAME) == 0) {
chopped = true;
} else if (TabletsSection.TabletColumnFamily.PREV_ROW_COLUMN.equals(cf, cq)) {
extent = new KeyExtent(row, entry.getValue());
}
}
if (extent == null) {
log.warn("No prev-row for key extent: " + decodedRow);
return null;
}
return new TabletLocationState(extent, future, current, last, walogs, chopped);
}
private static Scanner createCloneScanner(String tableId, Connector conn)
throws TableNotFoundException {
Scanner mscanner =
new IsolatedScanner(conn.createScanner(MetadataTable.NAME, Authorizations.EMPTY));
mscanner.setRange(new KeyExtent(new Text(tableId), null, null).toMetadataRange());
mscanner.fetchColumnFamily(DataFileColumnFamily.NAME);
mscanner.fetchColumnFamily(TabletsSection.CurrentLocationColumnFamily.NAME);
mscanner.fetchColumnFamily(TabletsSection.LastLocationColumnFamily.NAME);
mscanner.fetchColumnFamily(ClonedColumnFamily.NAME);
TabletsSection.TabletColumnFamily.PREV_ROW_COLUMN.fetch(mscanner);
TabletsSection.ServerColumnFamily.TIME_COLUMN.fetch(mscanner);
return mscanner;
}
public static void configureScanner(ScannerBase scanner, CurrentState state) {
TabletsSection.TabletColumnFamily.PREV_ROW_COLUMN.fetch(scanner);
scanner.fetchColumnFamily(TabletsSection.CurrentLocationColumnFamily.NAME);
scanner.fetchColumnFamily(TabletsSection.FutureLocationColumnFamily.NAME);
scanner.fetchColumnFamily(TabletsSection.LastLocationColumnFamily.NAME);
scanner.fetchColumnFamily(LogColumnFamily.NAME);
scanner.fetchColumnFamily(ChoppedColumnFamily.NAME);
scanner.addScanIterator(new IteratorSetting(1000, "wholeRows", WholeRowIterator.class));
IteratorSetting tabletChange =
new IteratorSetting(1001, "tabletChange", TabletStateChangeIterator.class);
if (state != null) {
TabletStateChangeIterator.setCurrentServers(tabletChange, state.onlineTabletServers());
TabletStateChangeIterator.setOnlineTables(tabletChange, state.onlineTables());
TabletStateChangeIterator.setMerges(tabletChange, state.merges());
}
scanner.addScanIterator(tabletChange);
}
